<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="js/vue.js"></script>
    <title>Document</title>
</head>
    <body>
        <div id="app">
           <div ref=""self>test</div>
        </div>
        <script>
            var vm = new Vue({
                el:"#app",
                data:{ 
                    msg:'ok'
                },
                beforeDestory() {
                    console.log('销毁之前')
                    console.log(this.$refs.self)
                    console.log(this.msg)
                    console.log(vm)
                },
                destroyed() {
                    console.log('销毁之后')
                    console.log(this.$refs.self)
                    console.log(this.msg)
                    console.log(vm)
                }
            })
         </script>
    </body>
</html>